B3844

Engine Coolant Circulation Pump Circuit

Severity

🔴 High

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

Engine overheating
Unstable engine operation
Check Engine Light Illuminated
Reduced cooling efficiency

Causes

Coolant pump malfunction
Open or short circuit in the pump circuit
Relay or fuse problems
Engine control unit malfunction

How to Fix

Check coolant pump fuses and relays
Diagnose the pump circuit for opens or short circuits
Check the functionality of the coolant pump
If necessary, replace the pump or repair the chain
Reset the error and check the system operation

Related codes

P0217 P0128 P2185